To switch between the Testlive and the Early Access client, simply right click on one of the options below. Save it to your hard drive, and swap
your LocalConfig.xml for one of the choices below:

Testlive LocalConfig.xmlEarly Access LocalConfig.xml

If you see two servers instead of the full server list, you currently have the TestLive localconfig file. Close the client, change it out for the Early Access file and restart the client. You'll probably have some additional patching to do.